Page 59 - Agriculture Form Two
P. 59
Agriculture for Secondary Schools
(b) Cassava green mites: They are tiny, greenish-yellow pests that infest
cassava plants, feeding on the undersides of leaves (Figure 3.7 (a) & (b).
Symptoms: Yellowing, mottling, death, and leaf fall.
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Management: Plant early at the onset of rain because their effect is severe during
the dry season, practising crop rotation. Spray recommended insecticide.
Figure 3.7 (a): Cassava green mite Figure 3.7 (b): Cassava green mite damage
symptoms on cassava leaf
Source:https://plantwiseplusknowledgebank.org/doi/10.1079/PWKB.20167800978
(a) Whiteflies: They are small, sap-sucking insects (Figure 3.8).
Symptoms: They suck sap from cassava leaves, leading to yellowing of leaves,
wilting, and stunting of the plant. They excrete honeydew, a sugary substance
that promotes the growth of sooty mould.
Management: Whiteflies are managed by removing and destroying infested plant
debris to prevent the spread of whiteflies. Rotating cassava with non-host crops
and practising intercropping with plants that repel whiteflies, such as marigolds,
is advisable. Insecticides can be used under the guidance of agricultural experts.
Student’s Book Form Two 51
04/10/2024 18:07
Agriculture form 2.indd 51 04/10/2024 18:07
Agriculture form 2.indd 51
